For proper illumination the organ lamp light tube should be approximately 16 inches above the top of the music rack ledge. This will provide plenty of height for even over-sized scores. Your light will be built with correct height when you order with the Lamp Height as calculated with these measurements:
A = Measure the distance of the top of the music rack straight down to the top of the console (in inches).
B = Measure the distance from the top of the music rack to the ledge (in inches). NOTE: Measure to the top of the ledge where the music rests (not to the underside of the ledge).
Enter the values of A and B into the height calculator, then click "Calculate" to arrive at the optimal lamp height.